--- a/src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp	Tue May 07 16:04:36 2019 +0200
+++ b/src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp	Tue May 07 16:05:49 2019 +0200
@@ -50,6 +50,8 @@
   FLAG_SET_DEFAULT(ShenandoahStoreValEnqueueBarrier, false);
   FLAG_SET_DEFAULT(ShenandoahCASBarrier,             false);
   FLAG_SET_DEFAULT(ShenandoahCloneBarrier,           false);
+
+  FLAG_SET_DEFAULT(ShenandoahVerifyOptoBarriers,     false);
 #endif
 
 #ifdef _LP64